Houses in vegas compared to those in BJ and SH? You've gotta be kidding.
Tax comparisons neglected the facts on state income tax, social security tax, medicare tax, property tax etc. Taking home 60% of income in the US is a norm.
Social security in the US is no different: young workers are paying the benefit for the retired. We do not expect we would get social security when we retire.
Hotels in China are not more expensive. You cannot compared a 4 star hotel in BJ with a Motel 6 in LA. Best hotels in NYC, Boston, Chicago cost $350 a night easily.
Owning a car in the US is less expensive. True.
Elementary education in China is expensive and is a mess.
Generally goods in China are cheaper. Services in China are a lot cheaper than in the US.